[...] weather experts said some Bay Area beaches may pose more of a risk than relief from the sweltering temperatures due to tropical storms stirring up sneaker waves and rip currents.A hot air mass known as a thermal belt will send temperatures soaring to 105 degrees at Lake Berryessa in Sonoma County, Mount Diablo in Contra Costa County, the Santa Cruz Mountains, and the Santa Lucia Range and Pinnacles National Park in Monterey County, forecasters predict.The high pressure is also expected to cause unhealthy ozone levels in the South Bay and East Bay on Tuesday, prompting the Bay Area Air Quality Management District to issue a Spare the Air Alert for smog, the sixth such alert thus far this year.Because ozone can cause throat irritation, lung inflammation, congestion and chest pain, and worsen asthma, bronchitis and emphysema, people are encouraged to limit outdoor exercise to the early morning hours when ozone concentrations are lower.While temperatures in the hottest areas will gradually cool after Tuesday, an elevated risk of heat-related illness such as heat stroke and exhaustion is expected to persist through Thursday in inland areas, forecasters say.